Syringe.



J. PAYNE.

SYRINGB.; APPLICATION FILED DBO. 23, 1910.

1,012,700. Patented 11110.26, 1911.

frm/anton Jose/2:71, Per, ne

FFUE,

JOSEPH PAYNE, or manen, mussncirrSEMS.

sYRQINGn To all whom tt may coment.' f Be it known that I, JOSEPH PAYNE,of Melrose, in the county` of Middlesex and State of Massachusetts,'haveinvented cer-A tain new and useful Improvements in.

Syringes, of which the following is a specifcation.- `k

This vinvention frelates to a syringe the barrel of which has a tubularoutlet through which a liquid may be forced.

The invention relates primarily to a hypodermic syringe, thetubular-outlet being a hypodermic needle adapted to administersub-cutaneous injections.

The invention has for its object to providea syringe of this characterofsuch construction that the barrel and its outlet may be-discarded afterbeing once used, the syringe comprising, in addition to the barrel andits outlet, a barrel holder adapted to detachably engage the barrel 'andhaving a guidefor a piston rod adapted lto bear sepal rably on a pistoncontained in the barrel. The barrel, its tubular outlet, andthe pistontherein are of relatively cheap construction,

so that after being yused they may bediscarded and replaced by anotherbarrel similarly equipped. y

The invention consists in the improvements which I will now proceed todescrib and claim. n g y Of the accompanying drawings which form a partof this spec1ication,-Figure 1 represents a perspective View of a pistonsa barrel holder adapted to detachably engage a discardable barrel inaccordance with my invention; Fig. 2 represents a perspective Y view ofa piston rod adapted to be used with said holder; Fig. 3 representsv alongitudiw nal section of a complete syringe including a discardablebarrel, constructed in accordance with my invention; Fig. 4 represents asection on line 4-4 of Fig. 3; Fig. 5 represents a fragmentary sectionalview showing t-he piston Vrod coupled toa barrel holder;

Fig. 6 represents a longitudinal section of the barrel and its outletandpiston removed from the holder; Fig. 7. represents an enlargement ofFig. 6; and Fig. `8 represents a fragmentary sectional viewshowing adifferent form of head at the outer end of the barrel.

Similar referencecharacters indicate the,

Speoioationof Ietters Patent.

In the drawings, 12, represents a syrin e open both ends, and isprovided at one end with means for connecting a ltubular outlet 14thereto, said outlet being preferadapted to serve, when in the positionshown, as a stopper to retain a charge of l1qu1d 1n the barrel, and alsoto be moved Patented Dec. 26, 1911. l Appuuaaon 'mea nmmrfz'a mo. smalma 598,996.

toward the outlet and thusl act as a piston to expel liquid through saidoutlet. The head 13 is preferably provided with a nipple 13 a portionalso of soft rubber', surroundin of the cannula and securely yet exiblyconnecting it with the head, the cannula being provided with a cuppedflange 14a at its inner end adapted-to contain a small body of sealingwax to prevent escape of liquid throughthe cannula until the wax ispunctured by a wire inserted in the cannula. The barrel and itsaccessories abovedecost, so that it is entirely practicable to discardit after it has been once used, the said barrel constituting, in effect,a cartridge of which an indefinite number may be supplied for eachholder, hereinafter described, the cartridge being used successively.

My invention includes a holder `for the- .barrel or cartridge abovedescribed, said scribed may be made at a relatively small rod 17 againstthe piston alsol pressingthe head 13 against the abutment.

In the preferred embodiment of my in'`v vention here shown, the holdercomprises a semi-tubular portion 18, forming a tray into which thebarrel may be inserted andfromwhich it may be removed by a lateralmovement. The outer end of the tray, 18 is closed by an abutment '19',which as here shown, is a disk suitably secu-red to the half tube andprovided with a recess 2O extend-- ing from `one edge to and across itscenter,

A said recess being adapted to receive-the nipple 13. The opposite endof the tray 18 A s rod guide 21l is` movable.

4 removed` and replaced by another 'barrel is lprovided with a tubularenlargement 18 constituting a casing in which the piston Said guide is atube having at one end a head or handle/22,

and formed at its opposite end to be projected into the tray and-bear onthe inner' end of the barrel 12, and preferably to slid-- ingly enterthe barrel, as shown by Fig.\3.

23 represents a spring contained in the4 casing 18", said spring bearingat'one end n a shoulder within the casing, and at the other end on ashoulder on the guide 21, and being adapted to press the guide towardthe barrel12.

The piston rod 17 is movable freely endwise in the guide, and isprovided atfits outer end with a head or handle 24.

The rod isv separable from the guide `so that when a barrel is in placein the holder n' the rod may be stored beside the holder until its useis required.

When the guide 21is retracted, a barrel 12 inserted in the holder may bereadily which is secured by the forward pressure of the guide 21 againstit. To enable the guide 21 to be secured in la retracted position whilethe barrel is be-I ing removed and another inserted, I provide the idewith a pin 25 andv the casing 18"L w1th a slot 26. When the guide isrojected the pin enters the slot, as shown y Figs. 1 and 3. When it isdesired to hold the guide in a retracted position, the guide ispartially rotated to move the pin out of alinement Awith'the slot andcause the pin to bear on the rear end of the casing. v 4 l When theholder is not in use, the piston rodl 17 may be coupled to it bymeans ofan external screw-thread 27, formed on one end of the rod, and aninternal screwjthread. '28 formed in the inner end of the recess 20,

I 1 cess 20, forms a yielding support or cushion for the-cannulapermitting it to yield or tip'sidewise,the cannula havlng therefore aflexible connection with the syringe, which isA an advantage. i

lIt will be seen that the portion of the head 13 interposedv between'the reduced outer end of the vbarrel and the abutment 19, isvcompressedby the outward pressure exerted on the barrel .by the piston rod guide21, so that leakage of liquid. between the outer end of the barrel andthe head is prevented.

In Fig. 8 I show the barrel 12 of uniform diameter to its outer end, andprovided with a compressible head 13b formed as a plug or stopperpreferably of soft rubber, having a flange 13 which bears on the outerend of the barrel and on the inner side of the abutment 19. The pressureof Fig. 8 also shows the flange v having at one end a tubular portionand at I the ff opposite end a barrel abutment -provided with anlopening to receive al contracted barrel outlet, the portion of the` Iholder betweerr the tubular portion and the abutment being open at one.side and forming an open tray adapted to receive a bar.

rel, a tubular piston rod guide movable in said tubular portion andadapted tobe projected into the tray to engage one end of a 'syringebarrel inserted inthe tray and hold the opposite end of the barrelagainst the abutment, and a piston rod movable in said guide and adaptedto be projected into a syringe barrel held by the tray, the rod beingseparable from the guide. j

2. \A syringe comprising a barrel holder having at one end a tubularportion and at the other end, a barrel abutment provided with an openingto receive a contracted bar rel outlet, vthe *portionv of the, holderbetween the tubular. portion and the abutmentbeing -open at one sideand'forming an open tray adapted to receive a barrel, a tubular pistonrod` guide movable in said tubular portion, and a spring whichnormallypro-` jects one end portion of said guide' into the tray, said projectedend and the abutment engaging the end portions of the barrel andconfining it to the tray.

3. A syringe comprising a barrel holder having at one end a tubularportion and at the other end a barrel abutment-provided A 4. A syringecomprising a barrel holder.

` having at one the opposite end a barrel abutment providedl end a`ltubular portion and at with an opening to receive a contracted lbarreloutlet, the portion of the holder between the tubular portion and theabutment being open at one side and forming an open tray adapted toreceive a barrel and a tubular piston rod-'guide movable in said tubularportion, and adapted to be projected into the tray, a barrel adapted tobe inserted laterally inv said tray and `formed 'at one end to bear onthe abutment and at the opposite end to engagethe' projected end of thepiston rod guide, said barrel having a stopper formed as a piston, and atubular outlet formed to extend through the abutment, and a pist-on rodmovable in said guide and separable therefrom and from the piston.

5. A syringe comprising a barrel holder open at one side to receive andpermit the removal of a barrel, and provided aty one end with a barrelabutment and at theopposite end with piston rod movable 1n the guide andadapted to bear separately on a piston in a barrel engaged by theholder, the said abutment having an outlet-receiving recess, internallyscrew-threaded at its inner end, and the rod having an externalscrew-thread adapted to engage the internal thread ofthe recess todetachably connect the rod with the holder.

a piston rod guide, and a.

6. A syringe barrel composed of a glassv tube'open at oth ends andprovided at itsv outer end with an elastic head having an elasticnipple, and a lcannula inserted in said nipple and flexibly connectedwith 'the barrel, said cannula -having a cupped lange projectinginwardly from its inner end and adapted to hold a seal in position toobstruct the passage through the cannula.

7. A syringe comprising a barrel holder open at one side to receive andpermit the removal of a barrel and provided at one end with an abutment,and a barrel open at bothv ends and provided with an elastic headconstituting a packing between` the abutment and the interior of thebarrel, a portion of said^ head being interposed between the outer endof the barrel and the abutment,

and with a cannula having a liquid tight fit in said head, the holderbeing provided with means for pressing the barrel toward said abut-mentand thereby compressing the interposed portion of the head to maintain aliquid tight joint between the head and the barrel.

In testimony whereof I have 'alxed my signature, in presence of twowitnesses.

. JOSlEl-lf AYNE.- Witnesses:

C. F, BROWN, P. W'. PEzzET'rI.

